Earlier in the day we had a forecast of clear for both nights. We have high, thin cirrus which would be hardly noticeable if not for the moon. 66% humidity, wind light and variable. I am still managing 700-1000 SNR.

Sky was variable with high, thin cirrus most of the night. Seeing was 2.4-2.7 arc seconds except for a period around midnight when it was closer to 3 arcsecs. Princeton Instruments 1300b camera, Custom Scientific UBVRI filter set. 24" custom built, RC telescope.

I had lots of humidity here. These are pretty poor images, but for the sake of a limited two day campaign, I will post them. There might be one or two that have some use. I got 13 of the 17. Just ran out of sky. I was on the island of Nantucket last night, on the RC24. I got better data the night before with my 12 inch. I did not get flats and the camera has been off the scope, so I used old flats. I will try again tonight.

Here are my images of last night. The sky was clear but conditions were humid and the observatory was closed by high humidity alert after two sequences of images were taken. I enclose here the second set of images. The other set is available by request. These are 60s unfiltered exposures.

PTFS1201n field was infested with the Moon and the images were overexposed.

I was able to get somewhat better images at the beginning of the night, but later in the night the marine layer moved in. 15 images posted. I did get good flats this night. I would estimage PTFS1119h at 0.88 mags brighter in V than the ref star S1 in red box. Both 1201n and 1101aa were affected by the moon. I did not get anything for the former. All images in V.

We took images of V344Lyr and V1504Cyg at the RIT Observatory (Rochester, NY) last night. Latitude +43.0757, Longitude 77.6647 West, altitude 168 m. Meade 12-inch LX200 with SBIG ST-9E CCD camera and V-band filter. Conditions were decent, but the sky was bright due to haze. Observers were Kaitlin Schmidt (physics undergrad), Jen Connelly (faculty) and myself.

We stacked about 40 images, each 30 seconds long, to make the median-combined images attached here. The V344 Lyr image shows nothing at the location of the target, the V1504 Cyg image shows a smudge that might be my imagination. The limiting magnitude is around V=16, maybe 16.5, so I'm afraid these might not help much. The images were acquired around UT Sep 2 02:13 (V344 Lyr) and UT Sep 2 03:02 (V1504 Cyg).

Thank you for your interest in this campaign, and for all your images. They provided me with all the information I needed. Thanks a lot for your effort!

However, none of the targets was found in outburst so I did not study any of them :( This is really bad luck, as I usually find 1-2 outburst every 10 selected targets (that is what the selection aims for) . Of course, this is not in anybody's hands. I am observing other CVs reported in outburst by the ASSASN CV patrol, and one PTF CV that was not in the 17 selected.

More campaigns will follow in the future, since this is an ongoing research programme. I count on you!

I have a new observing run at William Herschel Telescope in La Palma this week, and again, I could use your help monitoring the state of some of my favourite targets. I apologize because this comes in a very short notice. Like in previous campaigns (https://www.aavso.org/aavso-alert-notice-527), I only need to know if the systems are in outburst or not, so non-detections are also useful for the faintest systems. One image per target on two separate nights will suffice, especially the night of May 24.

One image of every target should be obtained:

- between 23 May 17:00UT and 24 May 17:00 UT
- between 24 May 17:00UT and 25 May 17:00 UT

***The images must be posted to the thread no later than 25 May 18:00 UT.***

In the table below you can find the list of targets with magnitudes in quiescence (Q) and outburst (O):

AAVSO Alert Notice 543 announces this 2016 campaign on 20 CVs. The campaign is already underway and concludes tonight. This post is being made on the forum thread from 2015's second campaign because that is where the PI announced the 2016 targets and his request for coverage. He did this at the good recommendation of AAVSO staff who were covering for Elizabeth Waagen, who usually handles observing campaign requests and who was away. To minimize confusion, a new thread for this 2016 campaign was not created. Please note that the pdf file of finder charts in the PI's post and the one in the Alert Notice are the same list even though they have different names.

I have just been notified that the there are technical issues with the alignment of the optics of William Herschel Telescope, and the instrument cannot be mounted until Friday 27. That means that my observing run will start on Friday rather than tonight. Moreover, the photometric camera will not be available, and I won't be able to check the state of the systems to pick the ones in which outbursts have just started.

For this reason, it will be very timely if we could continue with the monitoring three more nights. So far, all systems observed are in quiescence. If any of them is found in outbursts in the following nights, it means that the outburst has started recently, and those systems are exactly what I aim to study. The images before the run starts will inform about systems in outburst, and I will study those systems. The images taken on the night of May 27 will provide additional information about the evolution of the outburst, or may identify new outbursts in case all targets remain in quiescence up to that point. New outbursts detected on the night of May 27 may change the targets I will study.

One image of every target should be obtained:

- between 25 May 17:00UT and 26 May 17:00 UT, posted no later than 27 May 18:00 UT
- between 26 May 17:00UT and 27 May 17:00 UT, posted no later than 27 May 18:00 UT
- between 27 May 17:00UT and 28 May 17:00 UT, posted no later than 28 May 18:00 UT

***On May 27, if you identify an outburst, please report it immediately in the forum (you can post the image later).***

I hope this is clear enough; but if you have questions, don't hesitate contacting me.

AAVSO Special Notice #416 repeats the information included in the PI's post regarding the extension of the 20 CVs campaign. It also includes the link to AAVSO Alert Notice 543, which announced the campaign, has the list of targets, and gives the link to the pdf images of the finder charts to be used.